Spray gun with pressure display

Abstract

A spray gun with pressure display for applying paint onto a painted object by atomizing the paint with compressed air. A pressure indicating device includes a digitally displayed pressure sensor (25), a pressure transducer part (24), and a display part (27) unitized with each other. The pressure indicating device is detachably installed on a spray gun body, and adapters (21, 22) without a pressure indication function are detachably fitted to the spray gun body according to the shape of the body grip part so that the presence or absence of the pressure indication function can be selected before use. The spray gun can be used under controlled conditions by allowing a worker to detect an air pressure at hand during spraying operation since the spraying air pressure largely affects paint finish as well as dispersion of atomized paint.

Description

BACKGROUND OF THE INVENTION[0001]1. Technical Field[0002]The present invention relates to a spray gun usable with a module including a removable, easy-to-view, high-accuracy digital pressure gauge being installed in the spray gun as necessary.[0003]2. Description of Related Art[0004]The air spray gun uses compressed air to atomize a paint for spraying an object to be coated. To assure a stable quality of painting with the spray gun, it is necessary to always monitor and control the pressure of spraying compressed air. There are available some spray guns in which the spraying air pressure can be checked by the user operating the spray gun.[0005]In the spray coating, both the quality of the finished coating and scattering of the paint mist greatly depend upon the spraying air pressure used in the air spray gun to spray paint on an object. Namely, it is well known that a higher air pressure will provide an increased energy for spraying and a finer atomization of the paint, which has ge...

AI Technical Summary

Benefits of technology

The present invention provides a spray gun with a pressure indication unit that can be easily attached to the spray gun and removed when not needed. The pressure indication unit includes a pressure sensor, converter, and indicator, and can be used with any spray gun. The pressure indication module is designed to be small and easily attached to the spray gun, and can be used with different types of spray guns. The spray gun can also be used with compressed air having a stable pressure, and the pressure indication module can be easily isolated from the outside. The spray gun allows for accurate and easy control of the air pressure, and can be cleaned with a thinner and exposed to organic solvents. The present invention also provides an air spray gun with a pressure sensor and pressure indication unit for accurately adjusting the pressure of the compressed air and controlling the air pressure to achieve a stable quality of the paint spray coating.

Problems solved by technology

However, the pressure gauge is rarely used in actual spray-coating because its weight and size are not acceptable in the routine paint spraying jobs.

However, since the pressure gauge has to be designed smaller for installation to a spray gun which is normally not so large, such a pressure gauge is not satisfactory with respect to accuracy and durability in the operating environments.

When the service life of the driving cell has expired, the pressure gauge itself has to be discarded and replaced with a fresh one, which will lead to wasting of resources and addition of wastes.

However, the pressure gauge thus used on the spray gun will add to the size and weight of the spray gun, which will cause increased fatigue of the user of the spray gun and will adversely affect the operability of the spray gun itself.

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